from numpy import array
def read_poly(file_name):
output = {'vertices': None, 'holes': None, 'segments': None}
file = open(file_name, 'r')
lines = file.readlines()
file.close()
lines = [x.strip('\n').split() for x in lines]
vertices= []
N_vertices, dimension, attr, bdry_markers = [int(x) for x in lines[0]]
for k in range(N_vertices):
label, x, y = [items for items in lines[k+1]]
vertices.append([float(x), float(y)])
output['vertices']=array(vertices)
segments = []
N_segments, bdry_markers = [int(x) for x in lines[N_vertices+1]]
for k in range(N_segments):
label, pointer_1, pointer_2 = [items for items in lines[N_vertices+k+2]]
segments.append([int(pointer_1)-1, int(pointer_2)-1])
output['segments'] = array(segments)
N_holes = int(lines[N_segments+N_vertices+2][0])
holes = []
for k in range(N_holes):
label, x, y = [items for items in lines[N_segments + N_vertices + 3 + k]]
holes.append([float(x), float(y)])
output['holes'] = array(holes)
return output
